Emit the Garmin AV400 protocol required to drive a Garmin 196/296 series GPS

Emit the set of AV400 strings required to drive a Garmin 400-series GPS from FlightGear

Set the ADF1 radio frequency, optionally preceded by a card rotation.

Set the ADF2 radio frequency, optionally preceded by a card rotation.

Select aircraft aerodynamics model to load

Add and enable a new scenario. Multiple options are allowed.

Select an aircraft profile as defined by a top level <name>-set.xml

Specify the exact directory to use for the aircraft (normally not required, but may be useful). Interpreted relatively to the current directory. Causes the <path-cache> from autosave_X_Y.xml, as well as --fg-aircraft and the FG_AIRCRAFT environment variable to be bypassed.

Aircraft model directory (UIUC FDM ONLY)

Aircraft

Specify starting position relative to an airport

Starting altitude

Specify a multiplier for the aspect ratio.

Open connection using the ATC sim protocol (atc610x)

Open connection using the Atlas protocol

Audio Options

Avionics Options

Specify the bits per pixel

Specify path to your web browser

assign a unique name to a player

Start on downwind abeam the selected carrier (must also specify a carrier)

Specify starting position on an AI carrier

Create an overcast ceiling, optionally with a specific thickness (defaults to 2000 ft).

Set the COM1 radio frequency

Set the COM2 radio frequency

Enable CompositeViewer (extra view windows)

Load additional properties from path

Display console (Windows specific)

Debugging Options

Deprecated option (disable internal AI subsystem)

Disable artificial traffic.

Disable anti-aliased HUD

Disable auto coordination

Clock advances normally

Disable 2D (flat) cloud layers

Disable 3D (volumetric) cloud layers

Disable runway light distance attenuation

Disable enhanced runway lighting

Disable FGCom built-in

Start in a running state

Fuel is consumed normally

Disable fullscreen mode

Disable celestial body growth illusion near the horizon

Disable 3D HUD

Disable Heads Up Display (HUD)

Disable extra mouse pointer

Disable instrument panel

Exclude random buildings objects

Exclude random scenery objects

Exclude random vegetation objects

Disable METAR based real weather fetching

Disable Rembrandt rendering

Don't save preferences upon program exit

Disable sound effects

Disable specular reflections on textured objects

Disable splash screen

Disable automatic scenery downloads/updates

Disable textures

Disable VR

Disable wireframe drawing mode

Slave the DME to one of the NAV radios, or set its internal frequency.

Base directory to use for aircraft and scenery downloads (the TerraSync scenery directory may be specifically set with --terrasync-dir)

Enable AI subsystem (required for multi-player, AI traffic and many other animations)

Enable artificial traffic.

Enable anti-aliased HUD

Enable auto coordination

Do not advance clock

Enable 2D (flat) cloud layers

Enable 3D (volumetric) cloud layers

Enable runway light distance attenuation

Enable enhanced runway lighting

Enable FGCom built-in

Start in a frozen state

Fuel tank quantity forced to remain constant

Enable fullscreen mode

Enable celestial body growth illusion near the horizon

Enable 3D HUD

Enable Heads Up Display (HUD)

Enable extra mouse pointer

(i.e. for full screen Voodoo based cards)

Enable instrument panel

Include random buildings objects

Include random scenery objects

Include random vegetation objects

Enable METAR based real weather fetching (this requires an open internet connection)

Enable Rembrandt rendering

Allow saving preferences at program exit

Enable sound effects

Enable specular reflections on textured objects

Enable splash screen

Enable automatic scenery downloads/updates

Enable textures

Enable VR

Enable wireframe drawing mode

Environment Options

Fail the pitot, static, vacuum, or electrical system (repeat the option for multiple system failures).

Select the core flight dynamics model

Can be one of jsb, larcsim, yasim, magic, balloon, ada, external, or null

Flight Model

Features

Specify additional aircraft directory path(s) (alternatively, you can use --aircraft-dir to target a specific aircraft in a given directory)

Specify the root data path

Specify the scenery path(s);

Defaults to $FG_ROOT/Scenery

Use a model viewer rather than load the entire simulator;

Specify starting position relative to a fix

Open connection using the Flarm protocol, which includes NMEA/GPS and traffic reporting messages

Read all waypoints from a file

Disable fog/haze

Enable fastest fog/haze

Enable nicest fog/haze

Specify field of view angle

Abort on encountering a floating point exception;

Open connection using the Garmin GPS protocol

General Options

Open connection using a predefined communication interface and a preselected communication protocol

Specify window geometry (640x480, etc)

Specify flight path angle (can be positive)

GMT

Specify heading (yaw) angle (Psi)

Show the most relevant command line options

Enable http server on the specified address. Specify the port or address:port to bind to.

Hud displays percentage of triangles culled

Hud Options

Hud displays number of triangles rendered

Start in air (implied when using --altitude)

IO Options

Open connection to an Agwagon joystick

Enable screen shot http server on the specified port (replaced by --httpd)

Open connection to a remote joystick

Print a report in JSON format on the standard output, giving information such as the FlightGear version, $FG_ROOT, $FG_HOME, aircraft and scenery paths, etc.

Select the language for this session

Starting latitude (south = -)

Use GUI launcher

Select aircraft livery

Load recording of earlier flightgear session. For <name>, if <name> ends with .fgdata it is treated as the local path of the recording file; otherwise we form the local path by prepending <name> with the tape directory and appending ".fgtape". For <url> (starting with http:// or https://) we download the remote recording (which must be a Continuous recording) in the background to a url-dependent filename while replaying it; if the url-dependent filename already exists it is assumed to be a truncated download and we only download any remaining data.

local aircraft time

Specify which logging class(es) to use

Log to directory DIR. The special value 'desktop' causes logging to the desktop (OS-dependent location). This option may be given several times, using a different value each time. Inside the specified directory, the written log file is named FlightGear_YYYY-MM-DD_<num>.log, where <num> takes the values 0, 1, 2, etc.

Specify which logging level to use

Starting longitude (west = -)

Specify initial mach number

Specify the materials file used to render the scenery (default: Materials/regions/materials.xml)

Maximum frame rate in Hz.

Pass a METAR string to set up static weather (this implies --disable-real-weather-fetch)

Allows you to define a minimum status level (=development status) for all listed aircraft

Run the FDM this rate (iterations per second)

Specify multipilot communication settings

MultiPlayer Options

Open connection using the FG Native Controls protocol

Open connection using the FG Native protocol

Open connection using the FG Native FDM protocol

Open connection using the FG Native GUI protocol

Set the NAV1 radio frequency, optionally preceded by a radial.

Set the NAV2 radio frequency, optionally preceded by a radial.

Specify starting position relative to an NDB

Specify the frequency of the NDB. Use with --ndb=ID

Network Options

Open connection using the NMEA protocol

Do NOT attempt to trim the model

(only with fdm=jsbsim)

Specify heading to reference point

Specify distance to reference point (statute miles)

Start at ground level (default)

Open connection using the OpenGC protocol

Specify parking position at an airport (must also specify an airport)

Specify which starting position on an AI carrier (must also specify a carrier)

Specify pitch angle (Theta)

Initial Position and Orientation

Set property <name> to <value>. <type> can be one of string, double, float, long, int, or bool.

Open connection using the interactive property manager

Specify which proxy server (and port) to use. The username and password are optional and should be MD5 encoded already. This option is only useful when used in conjunction with the real-weather-fetch option.

Open connection using the PVE protocol

(buildings, etc.)

Set up random wind direction and speed

Open connection using the Ray Woodworth motion chair protocol

Rendering Options

Reset all user settings to their defaults (rendering options etc)

Specify initial climb rate (can be negative)

Specify roll angle (Phi)

Route/Way Point Options

Open connection using the RUL protocol

Specify starting runway (must also specify an airport)

Specify the startup season

Enable flat shading

Enable smooth shading

Print a list of the currently available aircraft types

Show a list of available audio device

Situation Options

Explicitly specify the audio device to use

Run the FDM 'n' times faster than real time

Specify a starting date/time with respect to

system time

Enable telnet server on the specified port

Set target directory for scenery downloads

Anisotropic Texture Filtering: values should be 1 (default),2,4,8 or 16

Synchronize time with local real-world time

Synchronize time with real-world time

Add this time offset

Time Options

Specify a time of day

Trace the reads for a property;

Trace the writes for a property;

Trim the model

(only with fdm=jsbsim)

Specify turbulence from 0.0 (calm) to 1.0 (severe)

Specify velocity along the body X axis

Use feet for distances

Use meters for distances

Usage: fgfs [ option ... ]

Specify velocity along the body Y axis

Specify velocity along a vertical axis

Specify velocity along a West-East axis

Specify velocity along a South-North axis

Specify initial airspeed

Select an vehicle profile as defined by a top level <name>-set.xml

Show all command line options when combined with --help or -h

For a complete list of options use --help --verbose

Display the current FlightGear version

Specify the default forward view direction as an offset from straight ahead. Allowable values are LEFT, RIGHT, CENTER, or a specific number in degrees

Specify initial visibility

Specify initial visibility in miles

Specify starting position relative to a VOR

Specify the frequency of the VOR. Use with --vor=ID

Specify velocity along the body Z axis

Specify wind coming from DIR (degrees) at SPEED (knots)

Specify a waypoint for the GC autopilot;

binding subsystems

creating subsystems

downloading scenery

Error loading 3D model

Errors occured loading aircraft systems (fuel, electrical, hydrualics)

Audio FX description contains errors

Errors loading terrain (BTG)

The add-on '%VALUE%' contains errors. Please report this to the add-on developers.

This aircraft (%VALUE%) contains errors. This may include visual issues, or the aircraft might not fly at all. Check for an updated version of the aircraft from its developers.

The selected aircraft (%VALUE%) contains errors. This may cause visual issues, or the aircraft might not fly at all. Please report the information below to the aircraft hangar's maintainers.

The custom scenery at '%VALUE%' contains errors. Parts may be missing, or the scenery may not load at all. Check for an updated version of the scenery.

Errors were found loading the core simulator files (FGData). This usually indicates a problem with the installation, or your local disk.

The joystick (input device) '%VALUE%' couldn't be loaded correctly. This usually means its configuration file is incorrect.

Loading a model for another pilot (via multi-player) failed. The other pilot will appear as a default model. (You can disable these errors from the multiplayer settings dialog)

Allocating memory failed. Some resources will not be loaded. Adjust your settings to reduce view distance or number of objects loaded.

The scenario '%VALUE%' contains errors, and may not work correctly.

Problems occurred loading visual effects (shaders). This can cause objects to be invisible or appear incorrect. It can sometimes be fixed by changing rendering settings inside FlightGear, or occasionally, by updating the drivers for your graphics card.

Scenery downloaded via TerraSync is not loading correctly. The usually indicates a problem with your network connection or local disk.

Problems occured loading simulated aircaft traffic: some traffic may not appear.

Errors occurred in an unknown part of FlightGear. Please report this bug to the FlightGear development team.

Errors loading user-interface

Errors loading input device configuration

Texture failed to load

Shader / Effect problems

This dialog is work-in-progress. The information included above may not be fully correct, so please check the detailed information below and give feedback if something seems wrong. Please include all the information below, as well as the message above.

Errors loading scenery

Errors downloading scenery from TerraSync

File or resource is invalid or corrupted

File or resource header is incorrect

Unable to read/write files correctly (check permissions and disk space)

The resource contains a configuration problem

Network connection failure

The file or resource was not found

Unable to allocate sufficient memory

Unknown error

Scripted loading of XML failed

Errors loading model XML

finalizing position

finalizing subsystems

initializing

initializing graphics engine

initializing scenery

initializing subsystems

loading aircraft

loading aircraft list

loading navigation data

loading scenery

loading fixes

[VALUE]% complete

loading airport data

loading navigation aid data

loading points of interest

reading airport data

extracting [VALUE]

Saved settings were migrated from a previous version of FlightGear. If you encounter any problems when using the system, try restoring the default settings, before reporting a problem. Saved settings can affect the appearance, performance and features of the simulator.

Settings migrated

Unstable nightly build - some features may be under active development

Drag while holding the right mouse button to look around

Hold Ctrl while looking around to move the view up, down, left or right

Press a/A to adjust the simulation speed

Press x/X to zoom in and out

Find frequencies of nearby ATC services from the Radios dialog

Press v to change your viewpoint, Ctrl-V to return to the cockpit

Press F3 to take a screenshot

Join the FlightGear community at http://forum.flightgear.org

Press h to bring up a Heads Up Display

Show or hide the menu bar by pressing F10

Frame-rate too low? - try disabling AI traffic

Select Environment → Weather to fly in different weather

Press F12 to change the radio frequencies easily

Look around by holding down the right mouse button and moving the mouse

Select Multiplayer → Multiplayer Settings to join the shared flight environment

Can't get the engine started? - see Help → Aircraft Checklists

Drag while holding the middle and right mouse buttons to move the viewpoint

Press / to explore the internals of the simulator

Press Tab to move the viewpoint with your mouse and use the scroll wheel to zoom

The border of a high pressure region, in which the airmass becomes unstable and various convective and stratiform clouds may appear.

Border of a high pressure region

The border of a low pressure region, in which the airmass is unstable and convective clouds start to form layers and merge into stratiform clouds.

Border of a low pressure region

If you just got your IFR rating, this is what you are allowed to do. But can you?

CAT I minimum

This is expert level. You will barely see the taxiway from the cockpit, even if you are on ground. Fog and light drizzle, freezing level at 1000ft.

CAT IIIb minimum

With just a 1/4 mile visibility and clouds at 100ft, you don't see much of the runway until seconds before touchdown. Trust your instruments to stay alive.

CAT II minimum

The center of a high pressure region, characterized by descending air and hence only weak cloud development with high visibility.

Core high pressure region

The core of a low pressure region, characterized by overcast clouds, bad visibility on the ground and significant rainfall.

Core low pressure region

Fog developed this autumn's morning. Expect good visibility above the layer. However - getting through it can be a challenge. Stay alive for a 500' climb and you'll see the sun!

Early morning fog

A lovely day for trip to your favorite 100$ hamburger airfield

Fair weather

A high pressure region, characterized by moderate to strong Cumulus development in the afternoon and fairly good visibility conditions.

High pressure region

Fetch live weather data for your nearest airport from noaa.gov. You need a working internet connection. Weather is generated automatically, once a valid METAR is received.

Live data

A low pressure region, characterized by rising air, widespread formation of stratiform clouds and beginning rain.

Low pressure region

Enter your favorite METAR weather. A valid METAR syntax is required.

Manual input

After the storm - limited visibility and some showers. Go or No-Go?

Marginal VFR

You're out for an adventure? Gusty winds blowing from the west and isolated thunderstorms should be avoided. Fasten your seatbelt!

Stormy Monday

A hot and damp summer day with thunderstorms developing in the afternoon. Be prepared for reduction of visibility in showers and strong gusts near thunderstorms

Thunderstorm

A warm sector, characterized by high moisture in the air and haze extending up to high altitudes, but otherwise largely convective cloud development.

Warm sector